402223290 has 64 divisors (see below), whose sum is σ = 1128923136. Its totient is φ = 89796672.

The previous prime is 402223273. The next prime is 402223291. The reversal of 402223290 is 92322204.

It is a self number, because there is not a number n which added to its sum of digits gives 402223290.

It is not an unprimeable number, because it can be changed into a prime (402223291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13242 + ... + 31301.

It is an arithmetic number, because the mean of its divisors is an integer number (17639424).

Almost surely, 2^402223290 is an apocalyptic number.

402223290 is an abundant number, since it is smaller than the sum of its proper divisors (726699846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402223290 is a wasteful number, since it uses less digits than its factorization.

402223290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44603.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 402223290 is about 20055.5052292382. The cubic root of 402223290 is about 738.1688900416.

Adding to 402223290 its reverse (92322204), we get a palindrome (494545494).

The spelling of 402223290 in words is "four hundred two million, two hundred twenty-three thousand, two hundred ninety".